laser

#### Data Filtering Section

Data filtering allows real-time filtering of the data. It removes the data as you scan.

The Data Filtering section provides the following options:

Line Filter: A real-time filter for individual lines, which provides smoothing and point reduction of incoming data from the laser sensor.

Mark the Line Filter check box to enable these options:

Max Deviation: As each incoming scan line is evaluated, points may be moved or smoothed in relation to their neighboring points. This setting defines the maximum allowed value that a point may be moved or smoothed.

Hole Size: When the software evaluates a scan line and detects a hole or gap of the specified size (or larger), the filter treats the scan segments as separate lines. In most cases, this can be set to the size of the smallest hole on the physical part.

Max Point Spacing: When analyzing the incoming scan data and reducing the number of points, this setting defines the maximum distance between two consecutive points. If the scan surface is curved, the resulting point spacing is typically smaller than the Max Point Spacing value.

When this parameter is set to zero, no point reduction is done. Typically, this value should be set to less than 1/3 of the hole size.

The Max Point Spacing setting determines the resolution of the scanned points. For most parts, the default values listed below can be used. To obtain higher resolution when scanning parts with small details, a smaller Max Point Spacing may be used. Using a smaller Max Point Spacing results in fewer points being filtered out and increases the total COP size.

| Max Point Spacing
Large Details | 1 mm / 0.03937 inch
Default | 0.75 mm / 0.02953 inch
Small Details | 0.5 mm / 0.01968 inch
Fine Details | 0.25 mm / 0.00984 inch

Percent Reduction: Removes a percentage of the pointcloud data collected.

1. Select the Percent Reduction option and in the box to its right, type a percentage value between 0-100. The value is the percent of the collected pointcloud data you want the software to filter out. If you enter zero, no filtering takes place.

2. Click OK to apply this to your measurement routine.

Distance Density: Provides a filtering based on the point distance value. If the distance between a point and its neighboring points is less than this value, the software discards the point. This option becomes available if you select the Points option in the Pointcloud Display section of the dialog box.

1. Select the Distance Density option and in the box to its right, type a distance value in the measurement routine units. Values greater than or equal to zero are valid. 1 mm is the default value. If your measurement routine uses inches, the software converts 1 mm to inches.

2. Click OK to apply the filtering.

Incidence Angle: Filters out all scanned points that have an incident angle greater than the entered value. The Incidence Angle check box is marked by default with a default value of 75. The angle is calculated between the estimated surface normal and the scan direction of the laser sensor. The smaller the value, the more points are filtered out.

Shiny sphere with no incidence angle applied

Shiny sphere with incidence angle on at default value 75

The Incidence Angle filter can be applied real-time while scanning. During scanning, the angle of the scan line relative to the measured surface is determined; any points outside the specified angle are automatically removed and discarded.

More:

Laser Data Collection Settings

Exclusion Plane Section

Pointcloud Display Section